This is part of a protest against a documentary coming out about World War II and how Latino-Americans were basically left out of the story. http://ap.google.com/article/ALeqM5jwDz5ycuaMYHWI37MyUNNWiIZtdA
Column written for the Washington Post expounds on this topic further: http://www.topix.net/content/wapo/2007/09/after-the-war-a-struggle-for-equality
